Crusher face plate



April 21, 1964 T. A. RATKowsKl CRUSHER FACE PLATE 2 Sheets-Sheet 1 FiledSept. 17, 1962 Inventor Thomas A.Ratknw5k Zlfaa, am( .190W

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United States Patent O 3,129,899 CRUSHER FACE PLATE Thomas A. Ratkowski,Chicago Heights, Ill., asslgnor to American Bral-ie Shoe Company, NewYork, N.Y., a corporation of Delaware Filed Sept. 17, 1962, Ser. No.224,060 3 Claims. (Cl. 241-291) This invention relates to a jaw platefor a jaw crusher or the like.

In crushing rock, ore and similar material, resort is frequently had toa jaw Crusher characterizedby a pa1r of jaw plates adapted to open andclose relative to one another incidental to establishing crushing actionon the material fed to the jaw of the crusher. It will be appreciatedthat the jaw plates are subjected to a great deal of abuse, and in factthe forces are so severe that there is a tendency for the metal at theworking face of the jaw plate to spread or expand because of thecompressive forces exerted thereon.

It has heretofore been proposed that the problem of metal expansion bealleviated by providing the working face of the jaw plate withrelatively deep slots, so-called peening slots, into which the excessmetal can flow to prevent warpage and distortion of the plate whichwould otherwise cause the plate to lose contact with the jaw platesupport structure, thereby contributing to early fatigue and failure ofthe plate due to llexing of the unsupported plate.

The depth of the peening slots or grooves becomes important because theslots must continue to function as the thickness of the jaw platebecomes thinner due to wear. Thus, the grooves to function for the lifeof the plate may have to be so deep in proportion to the thickness ofthe plate that they structurally weaken the plate and cause prematurefailure, and the primary object of the present invention is to overcomethis possibility by having resort to cross ties within the slots whichjoin the ribs that are defined by the slots.

Other and further objects of the present invention Will be apparent fromthe following description and claims and are illustrated in theaccompanying drawings which, by way of illustration, show a preferredembodiment of the present invention and the principles thereof and Whatis now considered to be the best mode contemplated for applying theseprinciples. Other embodiments of the invention embodying the same orequivalent principles may be made as desired by those skilled in the artwithout departing from the present invention and the purview of theappended claims.

In the drawings:

FIG. 1 is a plan view of a jaw plate constructed in accordance with thepresent invention;

FIG. 2 is a partial end view substantially on the line 2 2 of FIG. 1,and on an enlarged scale;

FIG. 3 is a fragmentary sectional view on the line 3 3 of FIG. l;

FIG. 4 is a schematic view of a jaw Crusher;

FIG. 5 is a side view of the plate shown in FIG. l, and taken on theline 5 5 of FIG. 2; and

FIGS. 6 and 7 are sectional views respectively on the lines 6 6 and 7 7of FIG. l, being on an enlarged scale.

In FIG. 4 of the drawing, there is depicted a general form of jawcrusher 10 having jaw structure 12 characterized by a pair of spaced jawplates 13 and 14 that are articulated one with respect to the other soas to establish quite large crushing forces on rocks and the like fedinto the jaw 12. `law crushers of the general type involved vary in themanner of actuation, and sometimes both jaw plates are movable, but forpurposes of disclosure herein the jaw plate 13 is xed and supported on abacking support 16, whereas the jaw plate 14 is supported on a movablebacking support 17 for oscillation induced by an eccentric 19 operatedby a fly wheel 20 in a well known manner.

As noted, the Crusher 10 is merely typical of a wide variety of jawcrushers, and it may be noted in this same connection that the jawplates themselves are of widely variant configuration. The jaw plate ofthe present invention, described in detail hereinafter, may be used asthe jaw plate 13 or the jaw plate 14, or configured otherwise to conformto the nature of the supports in the jaw crusher in which the presentinvention is to be utilized.

The jaw plate of the present invention is illustrated at 25 in FIG. 1,being generally rectangular in plan view. The jaw plate 25 includes aback 26, FIGS. 5, 6 and 7, configured to seat flush against the supportin the jaw crusher, as in the manner described above.

The working face 27 of the jaw plate 25, FIGS. l and 5 through 7,includes a plurality of parallel bars or ribs 28 which are separated bypeening slots or grooves 30. In the form of the invention illustrated inthe drawings, the ribs are approximately five times the width of theslots.

As noted above, the slots 30 are present in order that the flow of metalat the working faces of the crusher ribs can flow thereinto so that theplate does not expand or warp resulting in unseating at the back of theplate relative to the support, such as the jaw support 16 or 17identified in FIG. 4. Advantageously, the working ribs in the presentinstance have working faces of triangular shape characterized bydownwardly and inwardly sloping sides 28A and 28B, FIGS. 2 and 3, but inthis respect it is common practice to resort to various forms ofgeometry for the working faces of the ribs depending upon the type ofcrushing action involved, as is well known in the art. For example,trapezoidal sections and rounded working faces are quite common.

It is advantageous that the peening slots be as deep as possible, and inthe present instance extreme depth is achieved without apprehension ofweakening the plate by affording tie bars 35 in the slots, these beingcast integral with the entire structure, which itself is a one-piececasting, preferably of manganese steel. Thus, the tie bars 35 originateat the bottoms of the grooves 30, and interconnect opposed sides 36 and37 of adjacent ribs 28 as indicated in FIG. 3.

Maximum strength is achieved by spacing the tie bars alternately inadjacent slots. Thus, as shown in FIG. l, the tie bars 35-1, 35-2 and35-3 in the extreme righthand peening slot 30-1 are spaced to liebetween the tie bars 35-4 and 35-5 of the next inner peening slot 30-2,but are aligned with the tie bars 35-6 and 35-8 in the peening slot 30-3that is next to the left of the peening slot 30-2. This pattern isrepeated throughout the length and width of the jaw plate.

It will be seen from the foregoing that the present invention makes itpossible to provide peening slots of maximum depth in a jaw plate of thecharacter described, such being achieved by providing transverse tiebars within the peening slots having the ends thereof cast integralWit-h the opposed sides of adjacent jaw ribs. Resultantly, the peeningslots will continue to function substantially for the working life ofthe plate. Hence, while I have illustrated and described a preferredembodiment of my invention it is to be understood that this is capableof variation and modification, and I therefore do not wish to be limitedto the precise details set forth, but desire to avail myself of suchchanges and alterations as fall within the purview of the followingclaims.

I claim:

1. In a jaw crusher having reciprocal Crusher jaws,

3 a jaw plate comprising a back adapted to engage a support in theCrusher and a working face adapted to cooperate With the face of anopposed plate to apply crushing forces to rocks andthe like fedjto thejaw of the Crusher, said working face being characterized by a pluralityof spaced elongated Crusher ribs separated by peening slots, and saidribs being joined to one another by transverse tie bars located inspaced relation to one another in rows within said slots, said tie barsbeing of less height than said ribs so as to be confined below theworking surfaces of said ribs.

2. A jaw plate according to claim l wherein the jaw plate is a one-piececasting with the ends of the tie bars integral with and joined to theopposed sides of adjacent ribs.

3. A jaw plate according to claim 2 wherein the tie bars in adjacentslots are off-set one relative to another.

Buchanan May 8, 1906 Borden June 26, 1962

1. IN A JAW CRUSHER HAVING RECIPROCAL CRUSHER JAWS, A JAW PLATECOMPRISING A BACK ADAPTED TO ENGAGE A SUPPORT IN THE CRUSHER AND AWORKING FACE ADAPTED TO COOPERATE WITH THE FACE OF AN OPPOSED PLATE TOAPPLY CRUSHING FORCES TO ROCKS AND THE LIKE FED TO THE JAW OF THECRUSHER, SAID WORKING FACE BEING CHARACTERIZED BY A PLURALITY OF SPACEDELONGATED CRUSHER RIBS SEPARATED BY PEENING SLOTS, AND SAID RIBS BEINGJOINED TO ONE ANOTHER BY TRANSVERSE TIE BARS LOCATED IN SPACED RELATIONTO ONE ANOTHER IN ROWS WITHIN SAID SLOTS, SAID TIE BARS BEING OF LESSHEIGHT THAN SAID RIBS SO AS TO BE CONFINED BELOW THE WORKING SURFACES OFSAID RIBS.